Automatic gas-shut-off valve.



I. GLANSCHNIG. AUTOMATIC GAS SHUT-OPP VALVE.

APPLICATION FILED JUNE 6, 1913.

Patented Sept. 9

cnLUMBlA PLANOURAPH co., WASHINGTON. D. C.

IGNAZ GLANSCHNIG, 0F CHICAGO, ILLINOIS, ASSIGNOR 0F ONll-I-lLl-XIF TOWILHELM HATZFELD, 0F CHICAGO, ILLINOIS.

.AUTQMATJC GAS-SHUT-OFF VALVE.

novaeos.

g Specification of Letters Patent.

Patent-ea sept. a, reis.

Application led J' une 6, 1913. Serialll'o. 772,071.

residing at Chicago, in the county of Cookl and State of Illinois,haveinvented certain new and useful Improvements in AutomaticGras-Shut-Oif Valves; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention has for its object to provide an automatic gas shut-offvalve, particularly adapted for use on gas lixtures 1n homes and whichis ldesigned and intended to automatically shut 0E the gas in the eventthat the gas flame is blown out or otherwise accidentally extinguishedwithout the closure of the gas cock. y

The invention is illustrated in thevaccompanying drawings, in which-Figure 1 isa view in side elevation, partly in section, of an`auton'iatic gas shut-off apparatus embodying my invention. Fig. 2 is adetail fragmentary longitudinal section of the valve casing on the line2-.2 of Fig.

1. Fig. 3 is a vcentral Vvertical transverse section through thethermally controlled actuating means taken `on the. line 34.-?) of Fig..1. Fig. 4 is a. fragmentary detail sectional view' on'the line 4-4 ofFig. 2.

The particular object of the invention is to provide automatic gaslshut-off mechanism adapted to be applied to an ordinary style of gasfixture and which will prevent the escape of gas in any dangerousquantity in vthe event of the accidental extinguishment of the gas jetby causes other than closure of the gas cock.

A further object of the invention is to provide a thermally controlleddevice of this character in which,v to primarily obtain a flow `of gas,it is necessary for the user to'k operate two valve-actuating means,onefof which yis subsequently released by a thermostatically actuatedmeans, which, at the same time, actuates a supplemental device wherebythe function originally performed by the manually actuated part isperformed by the thermally actuatedfpart.

` In the accompanying drawings a suitable embodiment of the invention isillustrated. This consists of a valve casing interposed between the endsofthe service pipe 1 of a gas fixture. The valvek casing comprises a`cylindrical housing 2i, avalve seat carrying l `member 3 and4 couplingmembers. 4 and 5.

Disposed inthe ends of the valve housing; f are two perforated guideplatesG and 7,\m

each'of which is provided'witha central opening through which the stems8 and 9 vprojecting from opposite fends of the valve 10 project and areactuated. The saidvalve 10v seats on the valve-seat 11 of the member i l3 and is normally held on its-seat by means ofa lighthelical compression.springv12linterposed between the plate 6 and said valve 10. The valvestem 9 is'ilat land is provided between its ends with a longitudinalslot 13 `through which a shaft V'14 passes,*tlie latter carrying a cam15 which isiadapted to en gage the lower end of a part 16 of the Valvestem 9 immediately below' the Lvalve 10 to raise said valve from itsseat and support it o in its raised position. Said shaft 14 isjournaledat one end in a plug 17 yfitted into a lateral opening in the member 3and at its other end is journaled in ar hollow shaft 18 Y which issimilarly journaled in a'diametrically 'oppositely disposed plug 19infsaid member 3 and which carries a disk 20 vprovided with a crank pin21, which is adapted to engage the lower end of the portion 16 Vof thevalve stem 9, as hereinafter described.

Mounted on the hollow shaft 18 isan actuating arm 22 from the outerorfreeend of which a chain or cord 23 depends and by means of whichsaidshaft may be manually actuated. The said shafty 18 is normally heldin a position in which the arm 22 is p disposed in the positionindicated in dotted lines in Fig. 1 by means of the spring 24 engagedwith said arm 22 and with a rigid part of the valve casing.

The lower end of the portion 16k of the valve-stein 9 disposed in thepath of the Y' crank pin 21 is provided with a little recess.V 25V inwhich said crank pin engages, and to one side of the said recess 25 saidlower end is cut away at an incline to'provide a surface 26 normallydisposed in the pathof said pin'21, and which, when engaged thereby, isadapted to be raised by said pin out of its path so that the latter mayreach and engage in said recess 25,-whereupon t-he said recess 25 andpin21 coact to retainthe said pin and valve-stem interengaged. i 4 Y Thecam 15 engages the lowerend of said portionl on the vopposite side ofthel flat to raise the valve 10 to a greater elevation than said pin 21is ada `ated to raise the same. Said cam is adapted to be turned throughan arc of ninety degrees, more or less, from its normal posit-ion bymeans of the forked lever 27 engaged with the square end of said shaft14 and the other arm o f which isV revolubly mounted upon the projection28 carried by the plug 17. rlhe other arm of said lever 27 is pivotallyconnected with a link 29 which, at its other end, is vpivotallyconnected with a lever 30, the latter being pivotally mounted upon anexpansion member 31. VThe latter lconsists'of a ring of metalk which Yissupported above thev gas burner32 upon a plurality of arms 33 which, attheir lower ends, engage in a collar 34 carried by the gas fixture andat their upper Y ends are suitably engaged with said ring 31` Carried bvthering 31 is an inverted conical plate ,34 against `which the hot airandl gases vimpinge', and by means of which the same are defiected `soas to heat the said ring 31. The latter carries two'v integraldiametrically oppositely disposed projections 35 and 36, the formerbeing bifurcated at its free end and receiving the pivoted end of lthelever 30, the'latter being pivotally secured therein by means of the pin37 passing through said lever and through the contiguous portions ofV'the projections 35.

A stick of carbon or other suitable material having lower coeiiiciento-f expansion than` the ring 31 is rigidlysecured vto the projection 36,this being suitably accomplished by providing a threaded o-pening in oneend of the carbon 38 in which the screw 39 engages, the latter beingheld against rotation after securely drawing the carbonV into contactwith the projection 36 by. means .of the set screw 40. A similar screw41 is fitted in the other end of said carbon, the outer endportionthereof being devoidv of y threads and passing freely through an openingin the projection 35, said last-named screw serving merely as al supportfor the other end of the carbon. The latter is cut kaway at said end toprovide a recess42 in which a bar 43 is securely mounted by means of aclamp-collarV 44 of any suitable construction, whereby relativelongitudinal movement between said carbon and said bar 43 is prevented.The said bar Arejects into the recess in the bifurcated en of theprojection 35 and is provided contiguous to its outer end with alongitudinal slot -45 in .which a projection 46 on the pivoted end ofthe lever v30 engages.

l The flow of gas from the burner 32 is controlled by the usual gas cock47 in additionV to the valve 10 so that in igniting the gas it isnecessary that the said gas cock 47 be first opened and the chain 23drawn downward to turn the hollowl shaft 18 and disk 20 so that the pin.2l will raise the valve 10 from its seat and engage in said recess 25in the lower end of the part 16 of the stem of said valve V 1() toprimarily open the latter. After these two valves have been opened thegas may be ignited and the heat generated by the latter will then causethe vring 3l to expand, thereby moving the pivvthe cam 15 to engage thelower end of the portion 16 of the valve 1() and raise the latter to Vagreater elevation than the same has been vprimarily raised by the pin21. As soon as the valve 10 attains the higher elevation, the pin 21will be raised from engagement in the recess 25 and the spring 24 willthereupon return the hollow shaft 18 and arm 22 to the normal positionindicated in dotted lines inFig, 1.V The valve 10, however, is stillmaintained open as is also the cock 47. In the event thatthe gas flameshould be Vblovvn out or otherwise extinguished'byV causes other thanclosure of the cock 47 the ring 31 will immediately cool off and in thecourse of a few seconds will contract, thereby causing the lever 30 toreturn to the position indicated in Fig, 1 and turning the cam 15 out ofengagement with the lower end of the part 16 of the valve 10, therebycausing the latter to become seated and shutting off the vsupply of gas.

In order to reignite the gas it is neces'- sary to againV pull thechain23 lto open the `valve 10, whereupon the foregoing operation will repeatin the event of an accidental rextinguishment of the gas. The cock 47may obviously be omitted without affecting the operation of the'device.Y

My invention is, of course, capable of being variously modified, thedrawings being intended to illustrate a suitable embodiment withoutreference to the ultimate details of construction which may be readilyladapted to best suit my purposes. Y

I claim as new and desire to secure by Letters Patent 1. Automatic gasshut-ofi means comprising in combination a valve casing interposed inthe service pipe, a Vvalve and a valve-'seat therein, the valve memberhaving a portion projecting beyond the said seat; a pair ofv rotatablemembers housed by said casing and both adapted to engage the saidprojecting portion to Vopen the valve, one of said members manuallyactuable; a thermally eXpansible' member, and connectionsv between thelatter and the other of the said valve-opening members for actuating thelatteriin response to the expansion and contraction of the saidexpansible member.

2. VAutornatic gas shut-off means compris ing in combination a valvecasing interposed in the service pipe, a seat therein, a valve memberslidably mounted within said casing, a spring tending to force the saidvalve `against the said seat; a pair of rotatable `members mounted uponseparate and contating member is retained in its valve-opening position,the said rotating member being manually operated and yspring retracted;the

` other of said rotatable members being adapted to move the valvememberffor a suiiicient distance to enable the said coacting formationsto release each other; and thermostatically actuated means for operatingthe last-named valve-actuating member.

3. Thermallyk controlled valve closing meansv comprising a valvedisposed in the `service pipe, a thermally expansible member disposed`contiguous to the point of consumption of the gasv and adapted to beheated thereby, a rotatably mounted valve-opening 'cam disposed in theservice pipe, connections between the said cam and said thermallyexpansible member whereby said cam will be rotated into position to opensaid valve as said member becomes hot; an auxiliary manually operatedand spring-retracted cam rotatably mounted in the service pipe andadapted to primarily open the said valve, there being coactingformations upon the .said camk and valve for retaining the former initsvalve-opening positionwhen it has been manually moved to the same;and a spring engaging the said valve and holding the same in'its saidcoacting relation with the said manually actuable cam,

Vthe said spring also tending to close thevalve; the said thermallyactuated camy adapted to open the said valve to a greater extent thanthe said manually actuated cam, thereby throwing the latter out ofengaging relation lto the said valve. Y

4. In an automatic gas shut-O' device, they 4combination with a valvecasing interposed in the service pipe and a valve therein, ofthermostatically actuated means for operating the said valve; the saidmeans comprising a ring and a rod of materials having differentcoefficients of expansion, the said rod being mounted diametrically ofthe 'said ring and rigidly secured at one of its ends to the` ring, theother endv of the said rod being slidable with respect tothe portion ofthe ring diametrically opposite to that to which the aforesaid end ofthe rod is secured; transmission mechanism connecting the said ring,'rodand valve for causing the relative motion of the said slidable end ofthe rod with respect to the adjacent portion of the said ring to operatethe said valve; and a heat deilector positioned between the' point ofconsumption of the gas and the said rod, the said heat deflectoroperating to defleet the heated air toward the said ring.

5. Thermally controlled valve-operating means for a gas service pipe,comprising a cured to, and the other of its ends slidable v withrespectto, the other of the said members; a heat defiector positionedbetween the said point of consumption of the gas and one of the saidexpansible members, the said deflector operating to deflect the heatedair toward the other of the said expansible members; and mechanismconnecting the two expansible members and the said valve for operatingthe said valve by the difer- Y ence in kexpansion or contraction of thesaid eXpansible members 6. Thermally controlled valve-operating j;

means for a gas service pipe, comprising a valve disposed 1n the servicepipeyan eX- pansible ring and an eXpansible rod both disposed near thepoint of consumption of the gas; a heat deflector interposed between thesaid point of consumption of the gas and the said rod, the saidVdeiector adapted to direct the currents of hot air caused bytheconsumption of the gas against the said ringyand transmission mechanismconnecting the said ring, rod and valve for causing the difference'inexpansion or contraction of the said ring and rod to operate the saidvalve.

' In witness whereof I have signed my name in presence of twosubscribing'witnesses. p

IGNAZ GLANSCHNIG.

Witnesses LUDWIG LEUK, R. W. LoTz.

Copies of this patent maybe obtained for ve cents each, by addressingthe Commissioner of yatents,

Washington, D. C.

